Njira Yopangira Cellulose Ether

Ma cellulose ether ndi zinthu zosiyanasiyana zomwe zimagwiritsidwa ntchito m'mafakitale osiyanasiyana kuphatikizapo zomangamanga, mankhwala ndi chakudya. Njira yopangira cellulose ether ndi yovuta kwambiri, imakhala ndi masitepe angapo, ndipo imafuna ukatswiri wambiri komanso zida zapadera. M'nkhaniyi, tikambirana mwatsatanetsatane njira yopangira cellulose ethers.

Gawo loyamba pakupanga ether ya cellulose ndikukonzekera zipangizo zopangira. Zipangizo zopangira zomwe zimagwiritsidwa ntchito popanga ether ya cellulose nthawi zambiri zimachokera ku pulp ya matabwa ndi thonje lotayirira. Pulp ya matabwa imadulidwa ndikutsukidwa kuti ichotse zinyalala zazikulu, pomwe zinyalala za thonje zimakonzedwa kukhala pulp yosalala. Kenako pulp imachepetsedwa kukula popera kuti ipeze ufa wabwino. Pulp ya matabwa otayirira ndi thonje lotayirira zimasakanizidwa pamodzi muyeso wosiyana kutengera ndi momwe zinthu zomaliza zimafunira.

Gawo lotsatira limaphatikizapo kukonza mankhwala a chakudya chosakanikirana. Choyamba, zamkati zimachiritsidwa ndi yankho la alkaline (nthawi zambiri sodium hydroxide) kuti ziwononge kapangidwe ka cellulose. Kenako cellulose yomwe imachokera imachiritsidwa ndi chosungunulira monga carbon disulfide kuti ipange cellulose xanthate. Chithandizochi chimachitika m'matanki okhala ndi zamkati mosalekeza. Yankho la cellulose xanthate limatulutsidwa kudzera mu chipangizo chotulutsira kuti apange ulusi.

Pambuyo pake, ulusi wa cellulose xanthate unazunguliridwa m'bafa yokhala ndi asidi wosungunuka wa sulfuric. Izi zimapangitsa kuti unyolo wa cellulose xanthate ubwererenso, ndikupanga ulusi wa cellulose. Ulusi wa cellulose wopangidwa kumene umatsukidwa ndi madzi kuti uchotse zonyansa zilizonse usanatsukidwe. Njira yotsukidwa imagwiritsa ntchito hydrogen peroxide kuyeretsa ulusi wa cellulose, womwe umatsukidwa ndi madzi ndikusiyidwa kuti uume.

Ulusi wa cellulose ukauma, umadutsa mu njira yotchedwa etherification. Njira yopangira etherification imaphatikizapo kulowetsa magulu a ether, monga magulu a methyl, ethyl kapena hydroxyethyl, mu ulusi wa cellulose. Njirayi imachitika pogwiritsa ntchito njira yopangira etherification ndi asidi catalyst pamaso pa solvent. Nthawi zambiri zimachitika pansi pa kutentha ndi kupanikizika kolamulidwa bwino kuti zitsimikizire kuti zinthuzo zikukula bwino komanso kuti zinthuzo zikhale zoyera.

Panthawiyi, ether ya cellulose inali mu mawonekedwe a ufa woyera. Kenako chinthu chomalizidwa chimayesedwa kangapo kuti chitsimikizire kuti chinthucho chikukwaniritsa zomwe mukufuna komanso zofunikira, monga kukhuthala, kuyera kwa chinthucho komanso kuchuluka kwa chinyezi. Kenako chimapakidwa ndikutumizidwa kwa wogwiritsa ntchito womaliza.

Mwachidule, njira yopangira cellulose ether imaphatikizapo kukonzekera zinthu zopangira, kukonza mankhwala, kupota, kuyeretsa ndi kuyeretsa, kutsatiridwa ndi kuyesa kuwongolera khalidwe. Njira yonseyi imafuna zida zapadera komanso chidziwitso cha momwe mankhwala amagwirira ntchito ndipo imachitika pansi pa mikhalidwe yolamulidwa bwino. Kupanga cellulose ethers ndi njira yovuta komanso yotenga nthawi, koma ndi yofunika kwambiri m'mafakitale ambiri.